GNOME 3.2 is ready to Rocks !!, The GNOME team is done with major revamps for a while, GNOME 3.2 is all about polish, adding new features and improving some else.

GNOME 3.2 scheduled to be released in 28 September 2011, but you can test it via PPA that maintain by Rico Tzschichholz. Gnome 3.2 come with an integrated chat, share files and even take calls from the GNOME without the need to install any additional apps.

Here some features and changes which available in Gnome 3.2 (GTK+ 3.2.0 Features) :

Many improvements to the CSS theming support

Width-for-height support in many more widgets:

GtkPaned, GtkMenuBar, GtkNotebook,

New experimental Wayland and HTML5 backends

GtkFileChooser and GtkAssistant have received face-lifts

The GtkFontSelection has been replaced by a new

family of GtkFontChooser widgets

New widgets: GtkLockButton and GtkOVerlay

Install or Upgrade Gnome Shell 3.2 in Ubuntu 11.04/11.10 via PPA
This PPA is Experimental channel so Install/Upgrade it wisely and do with your own risk :)

* updated 1 oct 2011

Use this PPA this PPA which provide by Gnome 3 Development team to install Upgrade Gnome Shell 3.2 in Natty or Oneiric :

sudo add-apt-repository ppa:gnome3-team/gnome3

If PPA above not work you can try to use PPA that maintain by Rico Tzschichholz bellow.